30-seconds-of-code/snippets/euclideanDistance.md

title, tags, expertise, firstSeen, lastUpdated

title	tags	expertise	firstSeen	lastUpdated
Euclidean distance	math,algorithm	intermediate	2020-12-28T13:41:19+02:00	2020-12-28T13:41:19+02:00

Calculates the distance between two points in any number of dimensions.

• Use Object.keys() and Array.prototype.map() to map each coordinate to its difference between the two points.
• Use Math.hypot() to calculate the Euclidean distance between the two points.

const euclideanDistance = (a, b) =>
  Math.hypot(...Object.keys(a).map(k => b[k] - a[k]));

euclideanDistance([1, 1], [2, 3]); // ~2.2361
euclideanDistance([1, 1, 1], [2, 3, 2]); // ~2.4495